When a hydrogen atom absorbs a photon that raises it to the n = 5 state, how many different energies are possible for the photon(s) that may be emitted as the atom eventually returns to the ground state?
a. 4
b. 5
c. 6
d. 10
e. The correct answer is not given.
e
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Which of the following do the atoms 14C and 14N have in common?
A) total number of protons and neutrons B) number of electrons C) number of neutrons D) number of protons
A 2.0-m wire segment carrying a current of 0.60 A oriented parallel to a uniform magnetic field of 0.25 T experiences a force of what magnitude?
a. 0.30 N c. 0.15 N b. 6.7 N d. zero
If an electromagnetic wave has components Ey = E0 sin(kx - ?t) and Bz = B0 sin(kx - ?t), in what direction is it traveling?
A) -x B) +x C) +y D) -y E) +z
A wheel starts from rest and rotates with a constant angular acceleration about a fixed axis. It completes the first revolution 6.0 s after it started. How long after it started will the wheel complete the second revolution?
a. 9.9 s b. 7.8 s c. 8.5 s d. 9.2 s e. 6.4 s